Malicious PDF — malware analysis report

Static analysis result for SHA-256 7915554034f9870a…

MALICIOUS

PDF

66.7 KB Created: 2020-11-23 23:34:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3c0f728b846c132a4c15ca843aadea91 SHA-1: 39597aa4f6d2b0faefc4f3560731435f6ef58df1 SHA-256: 7915554034f9870accc876edddbf2a3b9ce856f2ac9a6f750f1a664121531256
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting it is part of a link farm designed to redirect users to potentially harmful sites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffnew.ru/123?utm_term=symbiotic+relationships+in+the+mojave+desert PDF link annotation
    • https://lagafuxomip.weebly.com/uploads/1/3/4/3/134347440/321292.pdfIn PDF document text
    • https://sixonawujow.weebly.com/uploads/1/3/4/3/134369174/towotupitebebu-mizore-tagom-nebipe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385198/normal_5f9a156faeac3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473947/normal_5fa8c3f87956e.pdfIn PDF document text
    • https://tunomofezu.weebly.com/uploads/1/3/2/3/132303147/judiruzixav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372105/normal_5fa1a5239a5f7.pdfIn PDF document text
    • https://vogizezadu.weebly.com/uploads/1/3/0/8/130814341/dopud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386330/normal_5f92308428326.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a070c0a-1912-4543-8bde-e99307269722/18672764875.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25c1e8d8-646b-4281-89cc-18edec8c1249/xeretipogabetudepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2aff470-984d-4adf-9e78-216ffa78be0f/38595593574.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E0 5792 bytes
SHA-256: 429a94d2e2ca2874f0d408d8c235f01eadad88f1e3058af56ce8246af0aef3ba
font_01_sfnt_off0000db7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7C 10088 bytes
SHA-256: 48e1ddc3324f46efb763f874e64e772d5ef4be203e22534450611b8d51e12896

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